Bali 2018.

Study characteristics
Methods	Retrospective single‐centre and surgeon cohort Apr 2014 to Sep 2016 University of Cambridge, England, UK 201 participants
Participants	Inclusion: women with breast cancer operated on by a single oncoplastic breast surgeon Exclusion: patients undergoing mastectomy
Interventions	Intervention: volume displacement and volume replacement (analysed separately) ‐ mammoplasty (19), chest wall perforator flaps (16), (n = 35) Control: BCS: wide local excision, (n = 166)
Outcomes	Primary outcomes: No outcomes of interest Secondary outcomes: Re‐excisions Other outcomes: Margins Length of stay
Notes	No disclosures/funding declared